> For the complete documentation index, see [llms.txt](https://bananapi.gitbook.io/bpi-m2/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bananapi.gitbook.io/bpi-m2/zh/bpi-m2_gpio_pin_define.md).

# BPI-M2 GPIO Pin define

Banana Pi has a 40-pin GPIO header that matches that of the Model B+ Raspberry Pi. Following is the Banana Pi GPIO Pinout:

![](/files/-M2HXMW36VzpUJ2du6me)

| GPIO Pin Name | Default Function | Function2：GPIO |
| ------------- | ---------------- | -------------- |
| CN7-P01       | VCC-3V3          |                |
| CN7-P02       | VCC-DC           |                |
| CN7-P03       | TWI2-SDA         | PH19           |
| CN7-P04       | VCC-DC           |                |
| CN7-P05       | TWI2-SCK         | PH18           |
| CN7-P06       | GND              |                |
| CN7-P07       | PWM1-P           | PH9            |
| CN7-P08       | UART5\_TX        | PE4            |
| CN7-P09       | GND              |                |
| CN7-P10       | UART5\_RX        | PE5            |
| CN7-P11       | UART2\_RX        | PG7            |
| CN7-P12       | PWM1-N           | PH10           |
| CN7-P13       | UART2\_TX        | PG6            |
| CN7-P14       | GND              |                |
| CN7-P15       | UART2\_CTS       | PG9            |
| CN7-P16       | PWM2-P           | PH11           |
| CN7-P17       | VCC-3V3          |                |
| CN7-P18       | PWM2-N           | PH12           |
| CN7-P19       | SPI1\_MOSI       | PG15           |
| CN7-P20       | GND              |                |
| CN7-P21       | SPI1\_MISO       | PG16           |
| CN7-P22       | UART2\_RTS       | PG8            |
| CN7-P23       | SPI1\_CLK        | PG14           |
| CN7-P24       | SPI1\_CS0        | PG13           |
| CN7-P25       | GND              |                |
| CN7-P26       | SPI1\_CS1        | PG12           |
| CN7-P27       | TWI3-SDA         | PB6            |
| CN7-P28       | TWI3-SCK         | PB5            |
| CN7-P29       | I2S-MCLK         | PB0            |
| CN7-P30       | GND              |                |
| CN7-P31       | I2S-BCLK         | PB1            |
| CN7-P32       | I2S-DI           | PB7            |
| CN7-P33       | I2S-LRCK         | PB2            |
| CN7-P34       | GND              |                |
| CN7-P35       | I2S-DO0          | PB3            |
| CN7-P36       | UART5\_RTS       | PE6            |
| CN7-P37       | I2S-DO1          | PB4            |
| CN7-P38       | UART5\_CTS       | PE7            |
| CN7-P39       | GND              |                |
| CN7-P40       | 1WIRE            | PM2            |

**CSI Camera Connector Pin specification:**

the CSI Camera Connector is a 40-pin FPC connector which can connect external camera module with proper signal pin mappings. The pin definitions of the CSI interface are shown as below. This is marked on the Banana Pi board as “CN6″.

| CSI Pin Name | Default Function | Function2：GPIO |   |
| ------------ | ---------------- | -------------- | - |
| CN6-P01      | LINEINL          |                |   |
| CN6-P02      | LINEINR          |                |   |
| CN6-P03      | VCC-CSI          |                |   |
| CN6-P04      | AVDD-CSI         |                |   |
| CN6-P05      | GND              |                |   |
| CN6-P06      | VDD-CSI          |                |   |
| CN6-P07      | MIC2P            |                |   |
| CN6-P08      | VCC-CSI          |                |   |
| CN6-P09      | MIC2N            |                |   |
| CN6-P10      | AFVCC-CSI        |                |   |
| CN6-P11      | GND              |                |   |
| CN6-P12      | CSI-IO0          | PM0            |   |
| CN6-P13      | LRADC0           |                |   |
| CN6-P14      | TWI0-SDA         | PH15           |   |
| CN6-P15      | MIC-MBIAS        |                |   |
| CN6-P16      | TWI0-SCK         | PH14           |   |
| CN6-P17      | CSI-D4           | PE8            |   |
| CN6-P18      | CSI0-STBY-EN     | PH27           |   |
| CN6-P19      | CSI-D5           | PE9            |   |
| CN6-P20      | CSI-PCLK         | PE0            |   |
| CN6-P21      | CSI-D6           | PE10           |   |
| CN6-P22      | CSI0-PWR-EN      | PG18           |   |
| CN6-P23      | CSI-D7           | PE11           |   |
| CN6-P24      | CSI-MCLK         | PE1            |   |
| CN6-P25      | CSI-D8           | PE12           |   |
| CN6-P26      | CSI0-RESET#      | PH26           |   |
| CN6-P27      | CSI-D9           | PE13           |   |
| CN6-P28      | CSI-VSYNC        | PE3            |   |
| CN6-P29      | CSI-D10          | PE14           |   |
| CN6-P30      | CSI-HSYNC        | PE2            |   |
| CN6-P31      | CSI-D11          | PE15           |   |
| CN6-P32      | CSI1-STBY-EN     | PH25           |   |
| CN6-P33      | AP-RESET#        |                |   |
| CN6-P34      | CSI1-RESET#      | PH24           |   |
| CN6-P35      | CSI-IO1          | PM1            |   |
| CN6-P36      | HPR              |                |   |
| CN6-P37      | HPL              |                |   |
| CN6-P38      | IPSOUT           |                |   |
| CN6-P39      | GND              |                |   |
| CN6-P40      | IPSOUT           |                |   |

**LVDS Pin specification**

LVDS (LCD display interface)

The LVDS Connector is a 40-pin FPC connector which can connect external LCD panel (LVDS) and touch screen (I2C) module as well. The pin definitions of this connector are shown as below. This is marked on the Banana Pi board as “CN9″.

| DSI Pin Name | Default Function | Function2：GPIO |
| ------------ | ---------------- | -------------- |
| CN9-P01      | IPSOUT           |                |
| CN9-P02      | TWI1-SDA         | PH15           |
| CN9-P03      | IPSOUT           |                |
| CN9-P04      | TWI1-SCK         | PH16           |
| CN9-P05      | GND              |                |
| CN9-P06      | TP-INT           | PG0            |
| CN9-P07      | LCD-PWR-EN       | PG4            |
| CN9-P08      | TP-RST           | PG1            |
| CN9-P09      | LCD0-D00         | PD0            |
| CN9-P10      | LCD0-PWM         | PH13           |
| CN9-P11      | LCD0-D01         | PD1            |
| CN9-P12      | LCD0-BL-EN       | PG3            |
| CN9-P13      | LCD0-D02         | PD2            |
| CN9-P14      | LCD0-DE          | PD25           |
| CN9-P15      | LCD0-D03         | PD3            |
| CN9-P16      | LCD0-VSYNC       | PD27           |
| CN9-P17      | LCD0-D04         | PD4            |
| CN9-P18      | LCD0-HSYNC       | PD26           |
| CN9-P19      | LCD0-D05         | PD5            |
| CN9-P20      | LCD0-CS          | PG2            |
| CN9-P21      | LCD0-D06         | PD6            |
| CN9-P22      | LCD0-CLK         | PD24           |
| CN9-P23      | LCD0-D07         | PD7            |
| CN9-P24      | GND              |                |
| CN9-P25      | LCD0-D08         | PD8            |
| CN9-P26      | LCD0-D23         | PD23           |
| CN9-P27      | LCD0-D09         | PD9            |
| CN9-P28      | LCD0-D22         | PD22           |
| CN9-P29      | LCD0-D10         | PD10           |
| CN9-P30      | LCD0-D21         | PD21           |
| CN9-P31      | LCD0-D11         | PD11           |
| CN9-P32      | LCD0-D20         | PD20           |
| CN9-P33      | LCD0-D12         | PD12           |
| CN9-P34      | LCD0-D19         | PD19           |
| CN9-P35      | LCD0-D13         | PD13           |
| CN9-P36      | LCD0-D18         | PD18           |
| CN9-P37      | LCD0-D14         | PD14           |
| CN9-P38      | LCD0-D17         | PD17           |
| CN9-P39      | LCD0-D15         | PD15           |
| CN9-P40      | LCD0-D16         | PD16           |

**UART Pin specification:**

The header CON4 is the UART interface. For developers of Banana Pi, this is an easy way to get the UART console output to check the system status and log message.

| CN8  Pin Name | Default Function | GPIO |   |
| ------------- | ---------------- | ---- | - |
| CN8 P03       | UART0-TXD        | PH20 |   |
| CN8 P02       | UART0-RXD        | PH21 |   |
| CN8 P01       | GND              |      |   |


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